I recently upgraded to a 10 speed shimano setup and I am experiencing chainrub on the large chainring and the second-most largest cog on the cassette. I have a Performance's microshift shifters, DA 7800 fd, a 50-36 r700 crankset, an ultegra 6700 chain and a 12-23 10 speed rear cassette. I'm running into what I would consider unacceptable chainrub on the inside of the front derailleur cage when running in the 50-21 combo. I've setup the fd as per park tool's website and alignment, h/l set screws limits look okay. Any suggestions on eliminating the chainrub? or is this a normal occurrence?